Adjustable reamer



Feb. 27, 19234.

2 SHE vS-SHIEETI W. B. JOHNSON. ADJUSTABLE REAMER.

'FILED MAR. 1l. 1921.

* EEET*R,

.Z'rz yen to? y .Attorney Feb. 27, 1923..

W. B. JOHNSON.

ADJUSTABLE REAMEB.

2 SHEETS-SHEET 2.

FILED MAR. il, 1921.

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F to2-wey' ritenga ret. 2v, i923..-

, l LIM B. JOHNSON', 01E' BATAVIA, ILLINOIS, ASSIGNDB T0 FOSTERFJ'OHNSN 'v COMPANY, A CORPORATLION 0F IN'DA.

ADUSTABLE E i Application ledvMarch 11, 1921.

To-all lwhomfz'if may concern.'

Be it known that l, WILLIAM B. JoHNsoN, acitizen of the United States, residing in the city of Batavia, county of Kane, Illinois, have invented certain new and useful Improvements in Adjustable Beamers, of which the following is a specification.

My invention relates to cutting tools, and especially to expansible or adjustable reamers.

The principal object of my invention is to provide an adjustable reamer'having two or more sets of cutting blades, each set of blades being adapted for separate actuation and adjustment to the cuttingposition. Another object of the invention is to provide twosets of cutting blades in an adjustablereamer, one setv being adapted to effect a rough or preliminarycut, and the other set being adapted to effect the linishing cut.

Other objects of my invention are mentioned and described herein. l

rl`he preferred embodiment of my invention is illustrated in vthe accompanying drawing, in which Figure 1 is a side view of the reamer; Fig. 2 is a View in section l taken longitudinally of the tool; Fig. 3 is a Sil section taken on the line 33 of Fig. 1; Fig. 4 is a view of the blade actuating spindle or plunger; Fig. 5 is a view of the spindley actuating nut; Fig. 6 isa sect-ion taken on the line 6 6 of Fig. 4; ,F'ig. 7 is'a section taken 0n the line 7-7 of Fig. 4; 8 is a side elevation of one of the cutting blades; Fig. 9 is a view of the wear block for the screw 4for the spindle actuating nut; Fig. 10 is a view at right angles of the element in Fig. 9; and Fig. 11 is an end view of the blade shown in Fig. 8.

Similar numerals of reference indicate like parts throughout theseveral views on the drawings. i: l

Referrin to the details of the drawings, the numera 1 indicates the reamer holder or rbody which is provided with a shank portion 2. rll`he holder 1 is centrally bored at 3 said bore being open at the forward end of s" slots 5 adapted t0 oonttin'cutting ra ity of blade slots 5 and 6, respectively, of

l. u EB..

Serial' No. 451,572.

blade 7, 7, and slots 6 are adapted to carry the blades 8, 8, all radiali movable in said slots, and each of said bla e sets 7 and 8, respectively, being adapted for separate use and actuation, as hereinafter described. ln fact, the several blades 7, 7 f constitute one set, and blades 8, 8 constitute another set, the former set being adapted for effecting the preliminary or rough cut, and the latter set being adapted to eect the final or finishing out. ln Fig. 3 of the drawings a cutting blade is shown which is indicated by numeral 7 although all the blades for both sets are alike in every respect.

Each cuttingblade is provided with a plurality of inclined seats' 9 and the rear end thereof may be beveled at 10. rlhe forward end of each blade may be incised to provide the pointed section 11 which is adapted to engage the holder undercut portion 12 at the forward end of each of the blade slots 5 and 6 to prevent radial displacement of the blade forward end. 'llhe holder bore 3 is engaged by the blade actuating spindle 13 which is slidably arranged therein and rendered nonrotative by a screw 14 set in the shank 2, the point of said screw being adapt-v ed to engage in either oneof two spaced andv parallel grooves 15 and 15', respectively, formed longitudinally of and in the spindle 13. The spindle 13 is provided also with a plurality of tapered-frusto-cone-cam sections 16 and 17, respectively. adapted tol carry the blade seats 9, 9 and by which said blades are radially actuated when said spindle is longitudinally actuated. rlihe cam section 16 is longitudinally slotted with a plurality of slots 18 extending through the cam, and the cam section 17 is provided with a corresponding set of longitudinal slotsV 19 which extend throu h thecam andv forward into the cylindrica portionofthe lspindle for a substantial distance to a point intermediate said cam section. In Figures 2 and 3 the blades 7 are engaged by the spindle cams 16 and 17, and the blades 8, of the second set, are in registration with the cam slots 18 and 19, in4 which slots the blade seats impossible so long as such engagement and registration with said slots continues. "llo reverse the position of the two sets of blades has a screw order to accomplish the main object of my tion, which blade reversal is accomplished a partial rotation of the spindle 13,'as hereinafter described, to change the position ofthe cam slots 18 and 19.

` Normally, the spindle 13is actuated reciprocally by a .revoluble handle 20 which is provided with a shaft section 21 rotatably mounted threaded extension 22 threaded into the end of the spindle 13. To prevent longitudinal movement of the handle 20 and its shaft 21 a circumferential groove 23 isformed in and around'the shaft 21, which groove is4 penetrated by the point of a screw 24 lthreaded into the holder shank 2. To prevent excessive wear on the lateral walls of the groove 23 a block'25 is provided, which block may be made in a plurality of segments, one of which is provided with a socket 26 adapted to be engaged by the point of the screw 24, whereby the block sides enthe point of the screw 24.

As heretofore stated, the point of the screw 14 may engage in either of' two grooves 15 and 15 formed in the spindle 13 to prevent spindle rotation when the latter is moved longitudinally. The ends of 'the grooves 15 and 15 are connected by a transverse groove or slot 27 in which latter groove the point of the screw 14 may also engage to permit partial rotation of the spindle, as hereinafter described, to enable the cam slots 18 and 19 to be alternately brought into cooperation and operative relation with the. blade sets 7 and 8.

The numeral 28 indicates a radially arranged recess forined in the spindle 13 and.

in the same circumferential plane with the slot or groove 27, which recess is adapted. to register with an elongated aperture 29 formed circumferentially in the holder shank 2 and in communication with the holder bore 3, which registration is effected wihen the spindle 13 is moved -forward to bring` the screw 14 into registration with either end of the transverse spindle groove 27. To effect partial rotation of the spindle 13 when thus positioned, a pointed instrument-not shown-may be thrust through the aperture 29 into the spindle recess 28 and lateral pressure brought to bear on rthe spindle therewith. Thereupon, the point of the screw 14 passes along the groove 27 into registration with either one of the two grooves 15 and 15', thereby moving the cam slots 18 and 19 out of cooperation and relation with one set of blades into cooperation and relation with the other set of blades.

The numeral 30 indicates a collar slidably mounted upon the holder 1 and provided with the undercut beveled face 31 adapted to engage the beveled blade end 10 ito prevent in' the shank bore 4 and which radial displacement of the latter from its slot. The rear face of the collar 30 is engaged by a plurality of coil springsI 32-one only being shownmounted in open end chambers 33 formed in the collar 34 which is screw threaded upon the holder at 35, whereby the collar 30 is held in yieldable engagement with the cutting blades:

The forward end of each blade may be held in yieldable engagement with the undercut holder portion 12 by a coil spring 36 arranged in a chamber 37 formed in the holder.

I claim:

1. An ladjustable reamer comprising a lholder provided with a plurality of longibeing adapted for separate use and actuation; and unitary adjustable means mounted jin the holder for selectively actuating any gage the walls of the groove 23 rather than one of the said blade sets to the operative curtting position.

' 2. A metal cutting tool comprising a holder provided with a plurality of longitudinally arranged blade holdin slots; a plurality of cutting blades movab y mounted in said slots, said blades being divided into a plurality of sets, each of said blade sets bein adapted for separate use and actuation; and unitary adjustable means mounted in the holder for actuating an one of said blade sets to the operative cutting position.

43. -A metal cutting tool comprising a holder provided with a plurality of longitudinally arranged blade holding slots; a pliirality of cutting blades movably mounted in said slots, said blades being divided into a plurality of sets, each of said blade sets being adapted for separate use and actuation; and unitary adjustable means mounted in the holder and movable longitudinally thereof for actuating any one of said blade sets to the operative cutting position.

4. A metal cutting tool comprising a holder provided with a plurality of longitudinally arranged blade holding slots; a plurality of cutting blades movably mounted in said slots, said blades being divided into two sets and each set adapted for separate use and actuation; and unitary adjustable means mounted in the holder for separately actuating each blade set, said means being adapted to be brought into operative engagement with either blade set by partial rotative adjustment thereof.

5. A metal cutting tool comprising a holder provided with a plurality of longitudiiially arranged blade holding slots; a plurality of cutting blades movably mounted in said slots, said blades being divided into two sets and each set adapted for separate use and actuation; unitary adjustable means ina naar

. to be brou ht into operative engagement with either lade set by partial rotatlve adjustment thereof; and means to prevent casual rotation of said blade actuating means.

63A metal cutting tool comprising a holder provided with a plurality of longitudinally arranged blade holding slots, said holder being provided also with a longi' tudinal bore in communication with said blade holding slots, a plurality of cutting blades movably mounted in sald slots, said blades being divided into two sets, each set being adapted for separate use and actuation; an adjustable longitudinally movable spindle mounted in said holder bore and provided with a plurality of cams adapted to engage and actuate one blade set only when said spindle is longitudinally actuated; and means for maintaining the adjustment or said s indle.

7. A metal cutting tool comprising a holder provided with a plurality of longitudinally arranged blade holding slots, said holder being provided also with a longitudinal bore in communication with said blade holdin slotsj a lurality of cutting blades Inovab y mounte in said slots, said blades being divided into two sets, each .set being adapted for separate use and actuation; and adjustable longitudinally movable spindle mounted in said holder bore and provided witha plurality of spaced cams extending circumferentially of saidI spindle, said cams being adapted to engage andactuate one set of said blades when said spindle is longitudinally actuated, the interstices of said cams being engaged by the second blade set and remaining inactive, said spindle being adapted also to be brought into operative engagement with said second blade set by partial rotation thereof, whereby said first named blade set is rendered inoperative; and

means to prevent casual rotation of said' spindle.

ln testimony whereof ll have hereunto atlixed my signature this 5th day of March, 1921.

WILLllAM B. JOHNSUN. 

